Moves Away), wrecking and overturning his car when B&B simultaneously wave through traffic on both intersecting streets during a blackout (Blackout!), or having his phone forcefully inserted into his rectum when Beavis and Butt-head accidentally lead prank-call victim Harry Sachz to his house (Prank Call). He tries to come off as a caring and responsible family man, but he reveals his cowardly nature in times of distress, invariably trying to shift blame to Stewart. He has a large collection of pornographic magazines, which Beavis and Butt-head know the exact location of. It is implied that he is impotent in Sperm Bank when he visits Stork in a Bottle Sperm Bank with his wife. In A Very Special Episode he rushes B&B to the animal hospital when they find a wounded baby bird. He takes them to a park to release the bird when, against their wishes, its condition improves. Butt-head flips it into the air, and it promptly falls to the ground as the pair walk away. He is also shown as a customer at Burger World who becomes frustrated when neither Beavis nor Butt-head can tell him whether the milk shakes are made with shake mix or milk and ice cream (Customers Suck). Mrs. Stevenson (voiced by Tracy Grandstaff) - Stewart's mother and good-natured housewife, who is depicted as an airhead. In Stewart's House, she has a Southern accent, but for the rest of the series, she possesses a thick Upper Midwestern accent. She enlists the duo's help when Stewart disappears (Stewart Is Missing), and she trusts them to take his homework to school for him when he is sick (The Great Cornholio). She believes that Beavis and Butt-head are good friends to Stewart, being oblivious to their antics and their negative influence on him. She is known for her catchphrase “Oh dear!”, which she especially frequently says when her son and Beavis and Butt-head get into trouble. In Plate Frisbee, she shows incredible trust (misplaced, of course) by serving cookies to Stewart and the boys on a plate she describes as "17th Century antique". Inspired by watching a discus thrower in the Olympics, B&B throw the plate back and forth like a frisbee, and it eventually shatters in Stewart's hand after a series of unlikely mishaps that should break it but don't. In TV Violence, she finally displays some anger toward the two. The Stevensons buy a satellite